Powershell: How to get a list of all the computers on your network

Lifted this from "Hey Scripting Guy"
(http://blogs.technet.com/heyscriptingguy/archive/2006/11/09/how-can-i-use-windows-powershell-to-get-a-list-of-all-my-computers.aspx)

$strCategory = "computer"
$objDomain = New-Object System.DirectoryServices.DirectoryEntry
$objSearcher = New-Object System.DirectoryServices.DirectorySearcher
$objSearcher.SearchRoot = $objDomain
$objSearcher.Filter = ("(objectCategory=$strCategory)")
$colProplist = "name"
foreach ($i in $colPropList){$objSearcher.PropertiesToLoad.Add($i)}
$colResults = $objSearcher.FindAll()
foreach ($objResult in $colResults)
{$objComputer = $objResult.Properties; $objComputer.name}